How can I start an Activity from a non-Activity class

Question

I have a map view activity that shows a few OverlayItems  In the onTap method of an overlay  I want to trigger a new activity that shows this overlay photo as a fullscreen  for example   When I do this inside my overlay class   Intent intent   new Intent    intent setClass getApplicationContext  FullscreenView class   startActivity intent        it can t find an application context  as I am not in the scope of an activity   When I add a method to my main activity  let s say startFullscreen   public static void startFullscreen         if  sCurrentPhoto    null            Intent intent   new Intent            intent setClass getApplicationContext    FullscreenView class           startActivity intent                       I can not call getApplicationContext   and startActivity    because I am in a static context  I need the static method however to call it in the Overlay class like MainView startFullscreen     Put simply  How can I start an Activity from a non-Activity class

User · Answer

I don t know if this is good practice or not  but casting a Context object to an Activity object compiles fine   Try this    Activity  mContext  startActivity

User · Answer

Your onTap override receives the MapView from which you can obtain the Context    Override public boolean onTap GeoPoint p  MapView mapView                    Intent intent   new Intent        intent setClass mapView getContext    FullscreenView class       startActivity intent

User · Answer

You can define a context for your application say ExampleContext which will hold the context of your application and then use it to instantiate an activity like this   var intent   new Intent Application ApplicationContext  typeof Activity2    intent AddFlags ActivityFlags NewTask   Application ApplicationContext StartActivity intent     Please bear in mind that this code is written in C  as I use MonoDroid  but I believe it is very similar to Java  For how to create an ApplicationContext look at this thread  This is how I made my Application Class       Application      public class Application   Android App Application  IApplication               public Application IntPtr handle  JniHandleOwnership transfer    base handle  transfer                               public object MyObject   get  set

User · Answer

Once you have obtained the context in your onTap   you can also do   Intent myIntent   new Intent mContext  theNewActivity class   mContext startActivity myIntent

[android] How can I start an Activity from a non-Activity class?

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